View Full Version : Electric fans for 78/9 Fords

m j
04-28-2007, 02:35 PM
Electric fans for 78/9 Fords

Starting with a Modine/ReadyRad Heatbuster #436002 LINK (http://www.pliii.com/productCatalog/catalog.asp?partnum=436002&brand=modine)

A set of 1999 Ford Windstar replacement fans from ebay

And after a few attempts ending up with a coolant fan switch from a 1985ish Nissan 300z Niehoff
#TS25461 LINK (http://www.niehoff.com/catalogs/nie_bgbulk.aspx?strSearch=TS25461)

I have wanted a new rad since my Brother got a Heatbuster last year.
after shredding a cutoff wheel on the grinder during a winch install that ended with the rad being ventilated I had a perfect opportunity to redo my cooling.

Rad install is pretty basic.
I had to trim the rad support to the larger opening size as mine was the smaller rad.
A couple of 5/16-18 clips and the rad was in looking factory


For the fan adapters I had a sheet of 14 gauge that I used to make a mounting bracket that bolts to the rad where the factory shroud would mount.

A couple of 3/8s bolts used as upstands,

a bit of scrap pipe as lower mounting cups.
And it is in. It could use some more trimming to pretty it up a bit.



The cooling fan switch is 1/4npt threaded and replaces the drain valve in the lower rad tank.
It switches on when the cold side is at 190°.
For me that translates to about 195° on the engine temp gauge.


Currently the relay bank is kind of hooky but I will show it to you anyway.
I used 10 gauge to carry power from the hot side of the solenoid to the circuit breakers
Each fan gets its own circuit breaker and relay.
The big fan has a 30amp cb and a 75 amp relay
The small side has a 20 amp cb and a 40 amp relay
The fans are constant ‘hot’


You could ground the relays trigger straight to the rad mounted cooling fan switch but I wanted a bit more control.
I ran the triggering wire into the cab in the factory harness (that I moved to a nicer spot on the firewall) to a 3 position SPDT on/off/on switch that I mounted next to my aftermarket temp gauge.
The trigger wire from the relay bank is on the center post, the bottom post gets a wire that goes to the ground point behind the gauge panel. The top post gets a wire that goes into the other main harness and out to the rad to meet the cooling fan switch.


m j
04-28-2007, 02:36 PM
this board makes a mess of my threads everytime

04-28-2007, 03:07 PM
any other info on electric fans , or better pictures . look like a great
fit .

m j
04-28-2007, 03:16 PM
what would you like to see or know? I will take any image you like and email it to you, my webspace is overcrowded so no big images online
they are generic offshore parts in my case.
they are supposed to be a 2 speed setup
I got these ones from ebay. long story but I ordered 1995 versions and after a few months of ebay disputing this is what they sent me, 1999- 05 version
I figured I would cut my loses and keep them :)
I tried to see if Lordco would bring me in another set but they do not stock the complete assemblys, so 4-6 weeks

the hardest part for me was finding the coolant fan switch for the cold side of the rad.
I have a pile of them that I tried including the hypertech on the way from summit that I am going to be into for $90 or more :)
I am going to use a camaro one in the upper water neck to trigger a warning buzzer/light if the temp exceeds 230°
seems crazy that camaros do not run the fans until the cylinder head is at 230° but there it is.

04-28-2007, 03:54 PM
looken for model and years of fan cause the fit looks way better
then my taurus fan and do you know what CFM they pull ?

m j
04-28-2007, 07:04 PM
I do not recall the cfm
those ones are 99-05 Windstar mini van fans
I can throw a tape on them for you in a few minutes

m j
04-28-2007, 09:10 PM
29.5 x 17.25 ish

04-29-2007, 02:43 PM
got one off 96 at pick a part to day for $38 thanks for the info

m j
04-29-2007, 04:53 PM
I have a coolant fan switch coming from summit that turns on at 176 and back off at 166
if your rad (I recall you had an aluminum aftermarket one) can take a 3/8npt fitting in the cold side it will be a perfect match for a 180 thermostat
hypertech 4026 iirc.
I now have no use for it.
will sell at cost

04-30-2007, 07:34 PM
my alumin rad does not seem to work that well have problems keeping
temp down when bagging the truck in 4L ,but have a 24" x 26" 3 core
that I forgot about . Looks like those fans would move air then my
single taurus and they seem to fit the stock great . Sounds like you
have the same temp. switch

05-01-2007, 10:49 PM
hey MJ how much did it cost altoghether rad and fans etc. Mine was about 75$ the old taurus trick but the cooling is a little jerry riged and you set up is pretty slik just wondering

m j
05-02-2007, 10:21 AM
cost is tricky to pin down.
the total cost to duplicate is pretty low but I have a handful of $30 -80 coolant fan temp switches that I had to try to get what I wanted. I paid $28 for the one I settled on, and will use the camaro 230° one in the water neck to trigger a warning light maybe a buzzer
IIRC the fans were $116usd on ebay, but I have had them for a few years.
the overkill 75 amp relay was $30-50, I was reading a bunch of posts about the taurus fans amp draw so overkilled a bit there to make sure I didnt have an issue
the fan motor connector was a PICO item that was another $5-10 but if you rob the fans from the wreckers you would take it (them actually I havent got the proper connector on the small fan) and the relays from the donor

you could do this for under a $100 pretty easy using the info I posted.
Patford said he paid $38, if you grab the harnesses and relays with the assembly all you need to add is a coolant fan switch for $30 and the wires to feed it.

05-02-2007, 10:36 PM
Thanks Mj
And killer setup

05-02-2007, 10:44 PM
good job Mike....looks good man...and works and gets ya some h.p.

win win yo...i gotta figure somethin out for the big block..

m j
05-03-2007, 05:58 PM
I bought the fans after reading about them on CK5 so it works on chevys too

05-29-2007, 12:57 PM
looks great bud... wow very nicely done..

I used one of those taurs fans you were talking about... here my set up...

I put a junkyard e-fan into my truck...

Heres my set up



and it installed




everyhting worked out amazing... works like a charm....

You can use these.... but i used 30 amp fuse and just kept the fan on low...


heres a right up on the fan i got ($10 at the local pick a part)

http://www.fordmuscle.com/archives/2003/02...icfan/index.php (http://www.fordmuscle.com/archives/2003/02/electricfan/index.php)

for the temp gauge i used this..

http://www.flex-a-lite.com/auto/pages3-47.pdf (it's 12 Mb look at page 28)

Part #31147

heres the wiring diagram i made for my install....


But bud yours looks great!!!!!!!!


05-30-2007, 11:13 PM
I ran one of those on my 76 it was pretty good at sucking air but the the main draw back i found was that it draws close to freakin 35-40 amps continuosly and since my alternator puts out 40 tops the rest self explanitor